Intrusion alarm



FIG. 1 is a pictorial view of the intrusion alarm embodying the novel design;

FIG. 2 is a front elevation view of the intrusion alarm of FIG. 1;

FIG. 3 is a side elevation view of the intrusion alarm of FIG. 1;

FIG. 4 is a top view of the intrusion alarm of FIG. 1; and

FIG. 5 is a rear elevation view of the intrusion alarm of FIG. 1. 

The ornamental design for an intrusion alarm, as shown. 